testtext.c 87.3 KB
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/* testtext.c
 * Copyright (C) 2000 Red Hat, Inc
 * Author: Havoc Pennington
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

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#include <config.h>
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#include <stdio.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>

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#undef GTK_DISABLE_DEPRECATED

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#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>

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#include "prop-editor.h"

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typedef struct _Buffer Buffer;
typedef struct _View View;

static gint untitled_serial = 1;

GSList *active_window_stack = NULL;

struct _Buffer
{
  gint refcount;
  GtkTextBuffer *buffer;
  char *filename;
  gint untitled_serial;
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  GtkTextTag *invisible_tag;
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  GtkTextTag *not_editable_tag;
  GtkTextTag *found_text_tag;
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  GtkTextTag *rise_tag;
  GtkTextTag *large_tag;
  GtkTextTag *indent_tag;
  GtkTextTag *margin_tag;
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  GtkTextTag *custom_tabs_tag;
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  GSList *color_tags;
  guint color_cycle_timeout;
  gdouble start_hue;
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};

struct _View
{
  GtkWidget *window;
  GtkWidget *text_view;
  GtkAccelGroup *accel_group;
  GtkItemFactory *item_factory;
  Buffer *buffer;
};

static void push_active_window (GtkWindow *window);
static void pop_active_window (void);
static GtkWindow *get_active_window (void);

static Buffer * create_buffer      (void);
static gboolean check_buffer_saved (Buffer *buffer);
static gboolean save_buffer        (Buffer *buffer);
static gboolean save_as_buffer     (Buffer *buffer);
static char *   buffer_pretty_name (Buffer *buffer);
static void     buffer_filename_set (Buffer *buffer);
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static void     buffer_search_forward (Buffer *buffer,
                                       const char *str,
                                       View *view);
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static void     buffer_search_backward (Buffer *buffer,
                                       const char *str,
                                       View *view);
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static void     buffer_set_colors      (Buffer  *buffer,
                                        gboolean enabled);
static void     buffer_cycle_colors    (Buffer  *buffer);
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static View *view_from_widget (GtkWidget *widget);

static View *create_view      (Buffer *buffer);
static void  check_close_view (View   *view);
static void  close_view       (View   *view);
static void  view_set_title   (View   *view);
static void  view_init_menus  (View   *view);
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static void  view_add_example_widgets (View *view);
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GSList *buffers = NULL;
GSList *views = NULL;

static void
push_active_window (GtkWindow *window)
{
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  g_object_ref (window);
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  active_window_stack = g_slist_prepend (active_window_stack, window);
}

static void
pop_active_window (void)
{
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  g_object_unref (active_window_stack->data);
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  active_window_stack = g_slist_delete_link (active_window_stack, active_window_stack);
}

static GtkWindow *
get_active_window (void)
{
  if (active_window_stack)
    return active_window_stack->data;
  else
    return NULL;
}

/*
 * Filesel utility function
 */

typedef gboolean (*FileselOKFunc) (const char *filename, gpointer data);

static void
filesel_ok_cb (GtkWidget *button, GtkWidget *filesel)
{
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  FileselOKFunc ok_func = (FileselOKFunc)g_object_get_data (G_OBJECT (filesel), "ok-func");
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  gpointer data = g_object_get_data (G_OBJECT (filesel), "ok-data");
  gint *result = g_object_get_data (G_OBJECT (filesel), "ok-result");
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  gtk_widget_hide (filesel);
  
  if ((*ok_func) (gtk_file_selection_get_filename (GTK_FILE_SELECTION (filesel)), data))
    {
      gtk_widget_destroy (filesel);
      *result = TRUE;
    }
  else
    gtk_widget_show (filesel);
}

gboolean
filesel_run (GtkWindow    *parent, 
	     const char   *title,
	     const char   *start_file,
	     FileselOKFunc func,
	     gpointer      data)
{
  GtkWidget *filesel = gtk_file_selection_new (title);
  gboolean result = FALSE;

  if (!parent)
    parent = get_active_window ();
  
  if (parent)
    gtk_window_set_transient_for (GTK_WINDOW (filesel), parent);

  if (start_file)
    gtk_file_selection_set_filename (GTK_FILE_SELECTION (filesel), start_file);

  
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  g_object_set_data (G_OBJECT (filesel), "ok-func", func);
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  g_object_set_data (G_OBJECT (filesel), "ok-data", data);
  g_object_set_data (G_OBJECT (filesel), "ok-result", &result);
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  g_signal_connect (GTK_FILE_SELECTION (filesel)->ok_button,
		    "clicked",
		    G_CALLBACK (filesel_ok_cb), filesel);
  g_signal_connect_swapped (GTK_FILE_SELECTION (filesel)->cancel_button,
			    "clicked",
			    G_CALLBACK (gtk_widget_destroy), filesel);
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  g_signal_connect (filesel, "destroy",
		    G_CALLBACK (gtk_main_quit), NULL);
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  gtk_window_set_modal (GTK_WINDOW (filesel), TRUE);

  gtk_widget_show (filesel);
  gtk_main ();

  return result;
}

/*
 * MsgBox utility functions
 */

static void
msgbox_yes_cb (GtkWidget *widget, gboolean *result)
{
  *result = 0;
  gtk_object_destroy (GTK_OBJECT (gtk_widget_get_toplevel (widget)));
}

static void
msgbox_no_cb (GtkWidget *widget, gboolean *result)
{
  *result = 1;
  gtk_object_destroy (GTK_OBJECT (gtk_widget_get_toplevel (widget)));
}

static gboolean
msgbox_key_press_cb (GtkWidget *widget, GdkEventKey *event, gpointer data)
{
  if (event->keyval == GDK_Escape)
    {
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      g_signal_stop_emission_by_name (widget, "key_press_event");
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      gtk_object_destroy (GTK_OBJECT (widget));
      return TRUE;
    }

  return FALSE;
}

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/* Don't copy this example, it's all crack-smoking - you can just use
 * GtkMessageDialog now
 */
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gint
msgbox_run (GtkWindow  *parent,
	    const char *message,
	    const char *yes_button,
	    const char *no_button,
	    const char *cancel_button,
	    gint default_index)
{
  gboolean result = -1;
  GtkWidget *dialog;
  GtkWidget *button;
  GtkWidget *label;
  GtkWidget *vbox;
  GtkWidget *button_box;
  GtkWidget *separator;

  g_return_val_if_fail (message != NULL, FALSE);
  g_return_val_if_fail (default_index >= 0 && default_index <= 1, FALSE);

  if (!parent)
    parent = get_active_window ();
  
  /* Create a dialog
   */
  dialog = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
  if (parent)
    gtk_window_set_transient_for (GTK_WINDOW (dialog), parent);
  gtk_window_set_position (GTK_WINDOW (dialog), GTK_WIN_POS_MOUSE);

  /* Quit our recursive main loop when the dialog is destroyed.
   */
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  g_signal_connect (dialog, "destroy",
		    G_CALLBACK (gtk_main_quit), NULL);
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  /* Catch Escape key presses and have them destroy the dialog
   */
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  g_signal_connect (dialog, "key_press_event",
		    G_CALLBACK (msgbox_key_press_cb), NULL);
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  /* Fill in the contents of the widget
   */
  vbox = gtk_vbox_new (FALSE, 0);
  gtk_container_add (GTK_CONTAINER (dialog), vbox);
  
  label = gtk_label_new (message);
  gtk_misc_set_padding (GTK_MISC (label), 12, 12);
  gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
  gtk_box_pack_start (GTK_BOX (vbox), label, TRUE, TRUE, 0);

  separator = gtk_hseparator_new ();
  gtk_box_pack_start (GTK_BOX (vbox), separator, FALSE, FALSE, 0);

  button_box = gtk_hbutton_box_new ();
  gtk_box_pack_start (GTK_BOX (vbox), button_box, FALSE, FALSE, 0);
  gtk_container_set_border_width (GTK_CONTAINER (button_box), 8);
  

  /* When Yes is clicked, call the msgbox_yes_cb
   * This sets the result variable and destroys the dialog
   */
  if (yes_button)
    {
      button = gtk_button_new_with_label (yes_button);
      GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
      gtk_container_add (GTK_CONTAINER (button_box), button);

      if (default_index == 0)
	gtk_widget_grab_default (button);
      
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      g_signal_connect (button, "clicked",
			G_CALLBACK (msgbox_yes_cb), &result);
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    }

  /* When No is clicked, call the msgbox_no_cb
   * This sets the result variable and destroys the dialog
   */
  if (no_button)
    {
      button = gtk_button_new_with_label (no_button);
      GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
      gtk_container_add (GTK_CONTAINER (button_box), button);

      if (default_index == 0)
	gtk_widget_grab_default (button);
      
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      g_signal_connect (button, "clicked",
			G_CALLBACK (msgbox_no_cb), &result);
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    }

  /* When Cancel is clicked, destroy the dialog
   */
  if (cancel_button)
    {
      button = gtk_button_new_with_label (cancel_button);
      GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
      gtk_container_add (GTK_CONTAINER (button_box), button);
      
      if (default_index == 1)
	gtk_widget_grab_default (button);
      
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      g_signal_connect_swapped (button, "clicked",
				G_CALLBACK (gtk_object_destroy), dialog);
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    }

  gtk_widget_show_all (dialog);

  /* Run a recursive main loop until a button is clicked
   * or the user destroys the dialog through the window mananger */
  gtk_main ();

  return result;
}

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#ifdef DO_BLINK
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/*
 * Example buffer filling code
 */
static gint
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blink_timeout (gpointer data)
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{
  GtkTextTag *tag;
  static gboolean flip = FALSE;
  
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  tag = GTK_TEXT_TAG (data);
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  g_object_set (tag,
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                 "foreground", flip ? "blue" : "purple",
                 NULL);

  flip = !flip;

  return TRUE;
}
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#endif
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static gint
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tag_event_handler (GtkTextTag *tag, GtkWidget *widget, GdkEvent *event,
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                  const GtkTextIter *iter, gpointer user_data)
{
  gint char_index;

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  char_index = gtk_text_iter_get_offset (iter);
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  switch (event->type)
    {
    case GDK_MOTION_NOTIFY:
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      printf ("Motion event at char %d tag `%s'\n",
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             char_index, tag->name);
      break;
        
    case GDK_BUTTON_PRESS:
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      printf ("Button press at char %d tag `%s'\n",
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             char_index, tag->name);
      break;
        
    case GDK_2BUTTON_PRESS:
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      printf ("Double click at char %d tag `%s'\n",
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             char_index, tag->name);
      break;
        
    case GDK_3BUTTON_PRESS:
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      printf ("Triple click at char %d tag `%s'\n",
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             char_index, tag->name);
      break;
        
    case GDK_BUTTON_RELEASE:
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      printf ("Button release at char %d tag `%s'\n",
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             char_index, tag->name);
      break;
        
    case GDK_KEY_PRESS:
    case GDK_KEY_RELEASE:
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      printf ("Key event at char %d tag `%s'\n",
              char_index, tag->name);
      break;
      
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    case GDK_ENTER_NOTIFY:
    case GDK_LEAVE_NOTIFY:
    case GDK_PROPERTY_NOTIFY:
    case GDK_SELECTION_CLEAR:
    case GDK_SELECTION_REQUEST:
    case GDK_SELECTION_NOTIFY:
    case GDK_PROXIMITY_IN:
    case GDK_PROXIMITY_OUT:
    case GDK_DRAG_ENTER:
    case GDK_DRAG_LEAVE:
    case GDK_DRAG_MOTION:
    case GDK_DRAG_STATUS:
    case GDK_DROP_START:
    case GDK_DROP_FINISHED:
    default:
      break;
    }

  return FALSE;
}

static void
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setup_tag (GtkTextTag *tag)
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{
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  g_signal_connect (tag,
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		    "event",
		    G_CALLBACK (tag_event_handler),
		    NULL);
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}

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static const char  *book_closed_xpm[] = {
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"16 16 6 1",
"       c None s None",
".      c black",
"X      c red",
"o      c yellow",
"O      c #808080",
"#      c white",
"                ",
"       ..       ",
"     ..XX.      ",
"   ..XXXXX.     ",
" ..XXXXXXXX.    ",
".ooXXXXXXXXX.   ",
"..ooXXXXXXXXX.  ",
".X.ooXXXXXXXXX. ",
".XX.ooXXXXXX..  ",
" .XX.ooXXX..#O  ",
"  .XX.oo..##OO. ",
"   .XX..##OO..  ",
"    .X.#OO..    ",
"     ..O..      ",
"      ..        ",
"                "};

void
fill_example_buffer (GtkTextBuffer *buffer)
{
  GtkTextIter iter, iter2;
  GtkTextTag *tag;
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  GtkTextChildAnchor *anchor;
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  GdkColor color;
  GdkColor color2;
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  GdkPixbuf *pixbuf;
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  int i;
  char *str;
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  /* FIXME this is broken if called twice on a buffer, since
   * we try to create tags a second time.
   */
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  tag = gtk_text_buffer_create_tag (buffer, "fg_blue", NULL);
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#ifdef DO_BLINK
  gtk_timeout_add (1000, blink_timeout, tag);
#endif     
 
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  setup_tag (tag);
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  color.red = color.green = 0;
  color.blue = 0xffff;
  color2.red = 0xfff;
  color2.blue = 0x0;
  color2.green = 0;
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  g_object_set (tag,
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                "foreground_gdk", &color,
                "background_gdk", &color2,
                "size_points", 24.0,
                NULL);
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  tag = gtk_text_buffer_create_tag (buffer, "fg_red", NULL);
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  setup_tag (tag);
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  color.blue = color.green = 0;
  color.red = 0xffff;
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  g_object_set (tag,
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                "rise", -4 * PANGO_SCALE,
                "foreground_gdk", &color,
                NULL);
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  tag = gtk_text_buffer_create_tag (buffer, "bg_green", NULL);
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  setup_tag (tag);
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  color.blue = color.red = 0;
  color.green = 0xffff;
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  g_object_set (tag,
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                "background_gdk", &color,
                "size_points", 10.0,
                NULL);
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  tag = gtk_text_buffer_create_tag (buffer, "strikethrough", NULL);
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  setup_tag (tag);
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  g_object_set (tag,
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                "strikethrough", TRUE,
                NULL);
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  tag = gtk_text_buffer_create_tag (buffer, "underline", NULL);
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  setup_tag (tag);
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  g_object_set (tag,
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                "underline", PANGO_UNDERLINE_SINGLE,
                NULL);
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  tag = gtk_text_buffer_create_tag (buffer, "underline_error", NULL);

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  setup_tag (tag);
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  g_object_set (tag,
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                "underline", PANGO_UNDERLINE_ERROR,
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                NULL);
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  tag = gtk_text_buffer_create_tag (buffer, "centered", NULL);
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  g_object_set (tag,
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                "justification", GTK_JUSTIFY_CENTER,
                NULL);
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  tag = gtk_text_buffer_create_tag (buffer, "rtl_quote", NULL);
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  g_object_set (tag,
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                "wrap_mode", GTK_WRAP_WORD,
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                "direction", GTK_TEXT_DIR_RTL,
                "indent", 30,
                "left_margin", 20,
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                "right_margin", 20,
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                NULL);
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  tag = gtk_text_buffer_create_tag (buffer, "negative_indent", NULL);
      
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  g_object_set (tag,
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                "indent", -25,
                NULL);
  
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  gtk_text_buffer_get_iter_at_offset (buffer, &iter, 0);

  anchor = gtk_text_buffer_create_child_anchor (buffer, &iter);

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  g_object_ref (anchor);
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  g_object_set_data_full (G_OBJECT (buffer), "anchor", anchor,
                          (GDestroyNotify) g_object_unref);
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  pixbuf = gdk_pixbuf_new_from_xpm_data (book_closed_xpm);
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  i = 0;
  while (i < 100)
    {
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      GtkTextMark * temp_mark;
      
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      gtk_text_buffer_get_iter_at_offset (buffer, &iter, 0);
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      gtk_text_buffer_insert_pixbuf (buffer, &iter, pixbuf);
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      str = g_strdup_printf ("%d Hello World! blah blah blah blah blah blah blah blah blah blah blah blah\nwoo woo woo woo woo woo woo woo woo woo woo woo woo woo woo\n",
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			    i);
      
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      gtk_text_buffer_insert (buffer, &iter, str, -1);
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      g_free (str);
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      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter, 0, 5);
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      gtk_text_buffer_insert (buffer, &iter,
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			     "(Hello World!)\nfoo foo Hello this is some text we are using to text word wrap. It has punctuation! gee; blah - hmm, great.\nnew line with a significant quantity of text on it. This line really does contain some text. More text! More text! More text!\n"
			     /* This is UTF8 stuff, Emacs doesn't
				really know how to display it */
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			     "German (Deutsch S\303\274d) Gr\303\274\303\237 Gott Greek (\316\225\316\273\316\273\316\267\316\275\316\271\316\272\316\254) \316\223\316\265\316\271\316\254 \317\203\316\261\317\202 Hebrew(\327\251\327\234\327\225\327\235) Hebrew punctuation(\xd6\xbf\327\251\xd6\xbb\xd6\xbc\xd6\xbb\xd6\xbf\327\234\xd6\xbc\327\225\xd6\xbc\xd6\xbb\xd6\xbb\xd6\xbf\327\235\xd6\xbc\xd6\xbb\xd6\xbf) Japanese (\346\227\245\346\234\254\350\252\236) Thai (\340\270\252\340\270\247\340\270\261\340\270\252\340\270\224\340\270\265\340\270\204\340\270\243\340\270\261\340\270\232) Thai wrong spelling (\340\270\204\340\270\263\340\270\225\340\271\210\340\270\255\340\271\204\340\270\233\340\270\231\340\270\267\340\271\210\340\270\252\340\270\260\340\270\201\340\270\224\340\270\234\340\270\264\340\270\224 \340\270\236\340\270\261\340\270\261\340\271\211\340\270\261\340\270\261\340\271\210\340\270\207\340\271\202\340\270\201\340\270\260)\n", -1);
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      temp_mark =
        gtk_text_buffer_create_mark (buffer, "tmp_mark", &iter, TRUE);
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#if 1
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      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter, 0, 6);
      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter2, 0, 13);
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      gtk_text_buffer_apply_tag_by_name (buffer, "fg_blue", &iter, &iter2);
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      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter, 1, 10);
      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter2, 1, 16);
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      gtk_text_buffer_apply_tag_by_name (buffer, "underline", &iter, &iter2);
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      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter, 1, 4);
      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter2, 1, 7);

      gtk_text_buffer_apply_tag_by_name (buffer, "underline_error", &iter, &iter2);

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      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter, 1, 14);
      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter2, 1, 24);
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      gtk_text_buffer_apply_tag_by_name (buffer, "strikethrough", &iter, &iter2);
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      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter, 0, 9);
      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter2, 0, 16);
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      gtk_text_buffer_apply_tag_by_name (buffer, "bg_green", &iter, &iter2);
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      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter, 4, 2);
      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter2, 4, 10);
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      gtk_text_buffer_apply_tag_by_name (buffer, "bg_green", &iter, &iter2);
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      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter, 4, 8);
      gtk_text_buffer_get_iter_at_line_offset (buffer, &iter2, 4, 15);
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      gtk_text_buffer_apply_tag_by_name (buffer, "fg_red", &iter, &iter2);
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#endif

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      gtk_text_buffer_get_iter_at_mark (buffer, &iter, temp_mark);
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      gtk_text_buffer_insert (buffer, &iter, "Centered text!\n", -1);
	  
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      gtk_text_buffer_get_iter_at_mark (buffer, &iter2, temp_mark);
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      gtk_text_buffer_apply_tag_by_name (buffer, "centered", &iter2, &iter);
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      gtk_text_buffer_move_mark (buffer, temp_mark, &iter);
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      gtk_text_buffer_insert (buffer, &iter, "Word wrapped, Right-to-left Quote\n", -1);
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      gtk_text_buffer_insert (buffer, &iter, "\331\210\331\202\330\257 \330\250\330\257\330\243 \330\253\331\204\330\247\330\253 \331\205\331\206 \330\243\331\203\330\253\330\261 \330\247\331\204\331\205\330\244\330\263\330\263\330\247\330\252 \330\252\331\202\330\257\331\205\330\247 \331\201\331\212 \330\264\330\250\331\203\330\251 \330\247\331\203\330\263\331\212\331\210\331\206 \330\250\330\261\330\247\331\205\330\254\331\207\330\247 \331\203\331\205\331\206\330\270\331\205\330\247\330\252 \331\204\330\247 \330\252\330\263\330\271\331\211 \331\204\331\204\330\261\330\250\330\255\330\214 \330\253\331\205 \330\252\330\255\331\210\331\204\330\252 \331\201\331\212 \330\247\331\204\330\263\331\206\331\210\330\247\330\252 \330\247\331\204\330\256\331\205\330\263 \330\247\331\204\331\205\330\247\330\266\331\212\330\251 \330\245\331\204\331\211 \331\205\330\244\330\263\330\263\330\247\330\252 \331\205\330\247\331\204\331\212\330\251 \331\205\331\206\330\270\331\205\330\251\330\214 \331\210\330\250\330\247\330\252\330\252 \330\254\330\262\330\241\330\247 \331\205\331\206 \330\247\331\204\331\206\330\270\330\247\331\205 \330\247\331\204\331\205\330\247\331\204\331\212 \331\201\331\212 \330\250\331\204\330\257\330\247\331\206\331\207\330\247\330\214 \331\210\331\204\331\203\331\206\331\207\330\247 \330\252\330\252\330\256\330\265\330\265 \331\201\331\212 \330\256\330\257\331\205\330\251 \331\202\330\267\330\247\330\271 \330\247\331\204\331\205\330\264\330\261\331\210\330\271\330\247\330\252 \330\247\331\204\330\265\330\272\331\212\330\261\330\251. \331\210\330\243\330\255\330\257 \330\243\331\203\330\253\330\261 \331\207\330\260\331\207 \330\247\331\204\331\205\330\244\330\263\330\263\330\247\330\252 \331\206\330\254\330\247\330\255\330\247 \331\207\331\210 \302\273\330\250\330\247\331\206\331\203\331\210\330\263\331\210\331\204\302\253 \331\201\331\212 \330\250\331\210\331\204\331\212\331\201\331\212\330\247.\n", -1);
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      gtk_text_buffer_get_iter_at_mark (buffer, &iter2, temp_mark);
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      gtk_text_buffer_apply_tag_by_name (buffer, "rtl_quote", &iter2, &iter);
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      gtk_text_buffer_insert_with_tags (buffer, &iter,
                                        "Paragraph with negative indentation. blah blah blah blah blah. The quick brown fox jumped over the lazy dog.\n",
                                        -1,
                                        gtk_text_tag_table_lookup (gtk_text_buffer_get_tag_table (buffer),
                                                                   "negative_indent"),
                                        NULL);
      
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      ++i;
    }

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Manish Singh committed
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  g_object_unref (pixbuf);
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  printf ("%d lines %d chars\n",
Havoc Pennington's avatar
Havoc Pennington committed
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          gtk_text_buffer_get_line_count (buffer),
          gtk_text_buffer_get_char_count (buffer));
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Havoc Pennington committed
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  /* Move cursor to start */
  gtk_text_buffer_get_iter_at_offset (buffer, &iter, 0);
  gtk_text_buffer_place_cursor (buffer, &iter);
  
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  gtk_text_buffer_set_modified (buffer, FALSE);
}

gboolean
fill_file_buffer (GtkTextBuffer *buffer, const char *filename)
{
  FILE* f;
  gchar buf[2048];
  gint remaining = 0;
  GtkTextIter iter, end;

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  f = fopen (filename, "r");
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  if (f == NULL)
    {
      gchar *err = g_strdup_printf ("Cannot open file '%s': %s",
				    filename, g_strerror (errno));
      msgbox_run (NULL, err, "OK", NULL, NULL, 0);
      g_free (err);
      return FALSE;
    }
  
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  gtk_text_buffer_get_iter_at_offset (buffer, &iter, 0);
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  while (!feof (f))
    {
      gint count;
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      const char *leftover;
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      int to_read = 2047  - remaining;
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      count = fread (buf + remaining, 1, to_read, f);
      buf[count + remaining] = '\0';

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      g_utf8_validate (buf, count + remaining, &leftover);
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      g_assert (g_utf8_validate (buf, leftover - buf, NULL));
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      gtk_text_buffer_insert (buffer, &iter, buf, leftover - buf);

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      remaining = (buf + remaining + count) - leftover;
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      g_memmove (buf, leftover, remaining);

      if (remaining > 6 || count < to_read)
	  break;
    }

  if (remaining)
    {
      gchar *err = g_strdup_printf ("Invalid UTF-8 data encountered reading file '%s'", filename);
      msgbox_run (NULL, err, "OK", NULL, NULL, 0);
      g_free (err);
    }
  
  /* We had a newline in the buffer to begin with. (The buffer always contains
   * a newline, so we delete to the end of the buffer to clean up.
   */
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  gtk_text_buffer_get_end_iter (buffer, &end);
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  gtk_text_buffer_delete (buffer, &iter, &end);
  
  gtk_text_buffer_set_modified (buffer, FALSE);

  return TRUE;
}

static gint
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delete_event_cb (GtkWidget *window, GdkEventAny *event, gpointer data)
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{
  View *view = view_from_widget (window);

  push_active_window (GTK_WINDOW (window));
  check_close_view (view);
  pop_active_window ();

  return TRUE;
}

/*
 * Menu callbacks
 */

static View *
get_empty_view (View *view)
{
  if (!view->buffer->filename &&
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      !gtk_text_buffer_get_modified (view->buffer->buffer))
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    return view;
  else
    return create_view (create_buffer ());
}

static View *
view_from_widget (GtkWidget *widget)
{
  if (GTK_IS_MENU_ITEM (widget))
    {
      GtkItemFactory *item_factory = gtk_item_factory_from_widget (widget);
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      return g_object_get_data (G_OBJECT (item_factory), "view");      
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    }
  else
    {
      GtkWidget *app = gtk_widget_get_toplevel (widget);
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      return g_object_get_data (G_OBJECT (app), "view");
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    }
}

static void
do_new (gpointer             callback_data,
	guint                callback_action,
	GtkWidget           *widget)
{
  create_view (create_buffer ());
}

static void
do_new_view (gpointer             callback_data,
	     guint                callback_action,
	     GtkWidget           *widget)
{
  View *view = view_from_widget (widget);
  
  create_view (view->buffer);
}

gboolean
open_ok_func (const char *filename, gpointer data)
{
  View *view = data;
  View *new_view = get_empty_view (view);

  if (!fill_file_buffer (new_view->buffer->buffer, filename))
    {
      if (new_view != view)
	close_view (new_view);
      return FALSE;
    }
  else
    {
      g_free (new_view->buffer->filename);
      new_view->buffer->filename = g_strdup (filename);
      buffer_filename_set (new_view->buffer);
      
      return TRUE;
    }
}

static void
do_open (gpointer             callback_data,
	 guint                callback_action,
	 GtkWidget           *widget)
{
  View *view = view_from_widget (widget);

  push_active_window (GTK_WINDOW (view->window));
  filesel_run (NULL, "Open File", NULL, open_ok_func, view);
  pop_active_window ();
}

static void
do_save_as (gpointer             callback_data,
	    guint                callback_action,
	    GtkWidget           *widget)
{
  View *view = view_from_widget (widget);  

  push_active_window (GTK_WINDOW (view->window));
  save_as_buffer (view->buffer);
  pop_active_window ();
}

static void
do_save (gpointer             callback_data,
	 guint                callback_action,
	 GtkWidget           *widget)
{
  View *view = view_from_widget (widget);

  push_active_window (GTK_WINDOW (view->window));
  if (!view->buffer->filename)
    do_save_as (callback_data, callback_action, widget);
  else
    save_buffer (view->buffer);
  pop_active_window ();
}

static void
do_close   (gpointer             callback_data,
	    guint                callback_action,
	    GtkWidget           *widget)
{
  View *view = view_from_widget (widget);

  push_active_window (GTK_WINDOW (view->window));
  check_close_view (view);
  pop_active_window ();
}

static void
do_exit    (gpointer             callback_data,
	    guint                callback_action,
	    GtkWidget           *widget)
{
  View *view = view_from_widget (widget);

  GSList *tmp_list = buffers;

  push_active_window (GTK_WINDOW (view->window));
  while (tmp_list)
    {
      if (!check_buffer_saved (tmp_list->data))
	return;

      tmp_list = tmp_list->next;
    }

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  gtk_main_quit ();
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  pop_active_window ();
}

static void
do_example (gpointer             callback_data,
	    guint                callback_action,
	    GtkWidget           *widget)
{
  View *view = view_from_widget (widget);
  View *new_view;

  new_view = get_empty_view (view);
  
  fill_example_buffer (new_view->buffer->buffer);
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  view_add_example_widgets (new_view);
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}

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static void
do_insert_and_scroll (gpointer             callback_data,
                      guint                callback_action,
                      GtkWidget           *widget)
{
  View *view = view_from_widget (widget);
  GtkTextBuffer *buffer;
  GtkTextIter start, end;
  GtkTextMark *mark;
  
  buffer = view->buffer->buffer;

  gtk_text_buffer_get_bounds (buffer, &start, &end);
  mark = gtk_text_buffer_create_mark (buffer, NULL, &end, /* right grav */ FALSE);

  gtk_text_buffer_insert (buffer, &end,
                          "Hello this is multiple lines of text\n"
                          "Line 1\n"  "Line 2\n"
                          "Line 3\n"  "Line 4\n"
                          "Line 5\n",
                          -1);

  gtk_text_view_scroll_to_mark (GTK_TEXT_VIEW (view->text_view), mark,
                                0, TRUE, 0.0, 1.0);
  gtk_text_buffer_delete_mark (buffer, mark);
}

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static void
do_wrap_changed (gpointer             callback_data,
		 guint                callback_action,
		 GtkWidget           *widget)
{
  View *view = view_from_widget (widget);

  gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (view->text_view), callback_action);
}

static void
do_direction_changed (gpointer             callback_data,
		      guint                callback_action,
		      GtkWidget           *widget)
{
  View *view = view_from_widget (widget);
  
  gtk_widget_set_direction (view->text_view, callback_action);
  gtk_widget_queue_resize (view->text_view);
}

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static void
do_spacing_changed (gpointer             callback_data,
                    guint                callback_action,
                    GtkWidget           *widget)
{
  View *view = view_from_widget (widget);

  if (callback_action)
    {
      gtk_text_view_set_pixels_above_lines (GTK_TEXT_VIEW (view->text_view),
                                            23);
      gtk_text_view_set_pixels_below_lines (GTK_TEXT_VIEW (view->text_view),
                                            21);
      gtk_text_view_set_pixels_inside_wrap (GTK_TEXT_VIEW (view->text_view),
                                            9);
    }
  else
    {
      gtk_text_view_set_pixels_above_lines (GTK_TEXT_VIEW (view->text_view),
                                            0);
      gtk_text_view_set_pixels_below_lines (GTK_TEXT_VIEW (view->text_view),
                                            0);
      gtk_text_view_set_pixels_inside_wrap (GTK_TEXT_VIEW (view->text_view),
                                            0);
    }
}

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static void
do_editable_changed (gpointer callback_data,
                     guint callback_action,
                     GtkWidget *widget)
{
  View *view = view_from_widget (widget);

  gtk_text_view_set_editable (GTK_TEXT_VIEW (view->text_view), callback_action);
}

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static void
change_cursor_color (GtkWidget *widget,
		     gboolean   set)
{
  if (set)
    {
      GdkColor red = {0, 65535, 0, 0};
      gtk_widget_modify_cursor (widget, &red, &red);
    }
  else
    gtk_widget_modify_cursor (widget, NULL, NULL);
}

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static void
do_cursor_visible_changed (gpointer callback_data,
                           guint callback_action,
                           GtkWidget *widget)
{
  View *view = view_from_widget (widget);

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  switch (callback_action)
    {
    case 0:
      gtk_text_view_set_cursor_visible (GTK_TEXT_VIEW (view->text_view), FALSE);
      break;
    case 1:
      gtk_text_view_set_cursor_visible (GTK_TEXT_VIEW (view->text_view), TRUE);
      change_cursor_color (view->text_view, FALSE);
      break;
    case 2:
      gtk_text_view_set_cursor_visible (GTK_TEXT_VIEW (view->text_view), TRUE);
      change_cursor_color (view->text_view, TRUE);
      break;
    }
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}

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static void
do_color_cycle_changed (gpointer callback_data,
                        guint callback_action,
                        GtkWidget *widget)
{
  View *view = view_from_widget (widget);

  buffer_set_colors (view->buffer, callback_action);
}

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static void
do_apply_editable (gpointer callback_data,
                   guint callback_action,
                   GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextIter start;
  GtkTextIter end;
  
  if (gtk_text_buffer_get_selection_bounds (view->buffer->buffer,
                                            &start, &end))
    {
      if (callback_action)
        {
          gtk_text_buffer_remove_tag (view->buffer->buffer,
                                      view->buffer->not_editable_tag,
                                      &start, &end);
        }
      else
        {
          gtk_text_buffer_apply_tag (view->buffer->buffer,
                                     view->buffer->not_editable_tag,
                                     &start, &end);
        }
    }
}

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static void
do_apply_invisible (gpointer callback_data,
                    guint callback_action,
                    GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextIter start;
  GtkTextIter end;
  
  if (gtk_text_buffer_get_selection_bounds (view->buffer->buffer,
                                            &start, &end))
    {
      if (callback_action)
        {
          gtk_text_buffer_remove_tag (view->buffer->buffer,
                                      view->buffer->invisible_tag,
                                      &start, &end);
        }
      else
        {
          gtk_text_buffer_apply_tag (view->buffer->buffer,
                                     view->buffer->invisible_tag,
                                     &start, &end);
        }
    }
}
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static void
do_apply_rise (gpointer callback_data,
	       guint callback_action,
	       GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextIter start;
  GtkTextIter end;
  
  if (gtk_text_buffer_get_selection_bounds (view->buffer->buffer,
                                            &start, &end))
    {
      if (callback_action)
        {
          gtk_text_buffer_remove_tag (view->buffer->buffer,
                                      view->buffer->rise_tag,
                                      &start, &end);
        }
      else
        {
          gtk_text_buffer_apply_tag (view->buffer->buffer,
                                     view->buffer->rise_tag,
                                     &start, &end);
        }
    }
}

static void
do_apply_large (gpointer callback_data,
		guint callback_action,
		GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextIter start;
  GtkTextIter end;
  
  if (gtk_text_buffer_get_selection_bounds (view->buffer->buffer,
                                            &start, &end))
    {
      if (callback_action)
        {
          gtk_text_buffer_remove_tag (view->buffer->buffer,
                                      view->buffer->large_tag,
                                      &start, &end);
        }
      else
        {
          gtk_text_buffer_apply_tag (view->buffer->buffer,
                                     view->buffer->large_tag,
                                     &start, &end);
        }
    }
}

static void
do_apply_indent (gpointer callback_data,
		 guint callback_action,
		 GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextIter start;
  GtkTextIter end;
  
  if (gtk_text_buffer_get_selection_bounds (view->buffer->buffer,
                                            &start, &end))
    {
      if (callback_action)
        {
          gtk_text_buffer_remove_tag (view->buffer->buffer,
                                      view->buffer->indent_tag,
                                      &start, &end);
        }
      else
        {
          gtk_text_buffer_apply_tag (view->buffer->buffer,
                                     view->buffer->indent_tag,
                                     &start, &end);
        }
    }
}

static void
do_apply_margin (gpointer callback_data,
		 guint callback_action,
		 GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextIter start;
  GtkTextIter end;
  
  if (gtk_text_buffer_get_selection_bounds (view->buffer->buffer,
                                            &start, &end))
    {
      if (callback_action)
        {
          gtk_text_buffer_remove_tag (view->buffer->buffer,
                                      view->buffer->margin_tag,
                                      &start, &end);
        }
      else
        {
          gtk_text_buffer_apply_tag (view->buffer->buffer,
                                     view->buffer->margin_tag,
                                     &start, &end);
        }
    }
}

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static void
do_apply_tabs (gpointer callback_data,
               guint callback_action,
               GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextIter start;
  GtkTextIter end;
  
  if (gtk_text_buffer_get_selection_bounds (view->buffer->buffer,
                                            &start, &end))
    {
      if (callback_action)
        {
          gtk_text_buffer_remove_tag (view->buffer->buffer,
                                      view->buffer->custom_tabs_tag,
                                      &start, &end);
        }
      else
        {
          gtk_text_buffer_apply_tag (view->buffer->buffer,
                                     view->buffer->custom_tabs_tag,
                                     &start, &end);
        }
    }
}

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static void
do_apply_colors (gpointer callback_data,
                 guint callback_action,
                 GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  Buffer *buffer = view->buffer;
  GtkTextIter start;
  GtkTextIter end;
  
  if (gtk_text_buffer_get_selection_bounds (view->buffer->buffer,
                                            &start, &end))
    {
      if (!callback_action)
        {
          GSList *tmp;
          
          tmp = buffer->color_tags;
          while (tmp != NULL)
            {
              gtk_text_buffer_remove_tag (view->buffer->buffer,
                                          tmp->data,
                                          &start, &end);              
              tmp = g_slist_next (tmp);
            }
        }
      else
        {
          GSList *tmp;
          
          tmp = buffer->color_tags;
          while (TRUE)
            {
              GtkTextIter next;
              gboolean done = FALSE;
              
              next = start;
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              gtk_text_iter_forward_char (&next);
              gtk_text_iter_forward_char (&next);
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              if (gtk_text_iter_compare (&next, &end) >= 0)
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                {
                  next = end;
                  done = TRUE;
                }
              
              gtk_text_buffer_apply_tag (view->buffer->buffer,
                                         tmp->data,
                                         &start, &next);

              start = next;

              if (done)
                return;
              
              tmp = g_slist_next (tmp);
              if (tmp == NULL)
                tmp = buffer->color_tags;
            } 
        }
    }
}

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static void
do_remove_tags (gpointer callback_data,
                guint callback_action,
                GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextIter start;
  GtkTextIter end;
  
  if (gtk_text_buffer_get_selection_bounds (view->buffer->buffer,
                                            &start, &end))
    {
      gtk_text_buffer_remove_all_tags (view->buffer->buffer,
                                       &start, &end);
    }
}

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static void
do_properties (gpointer callback_data,
                guint callback_action,
                GtkWidget *widget)
{
  View *view = view_from_widget (widget);

  create_prop_editor (G_OBJECT (view->text_view), 0);
}

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static void
rich_text_store_populate (GtkListStore  *store,
                          GtkTextBuffer *buffer,
                          gboolean       deserialize)
{
  GdkAtom *formats;
  gint     n_formats;
  gint     i;

  gtk_list_store_clear (store);

  if (deserialize)
    formats = gtk_text_buffer_get_deserialize_formats (buffer, &n_formats);
  else
    formats = gtk_text_buffer_get_serialize_formats (buffer, &n_formats);

  for (i = 0; i < n_formats; i++)
    {
      GtkTreeIter  iter;
      gchar       *mime_type;
      gboolean     can_create_tags = FALSE;

      mime_type = gdk_atom_name (formats[i]);

      if (deserialize)
        can_create_tags =
          gtk_text_buffer_deserialize_get_can_create_tags (buffer, formats[i]);

      gtk_list_store_append (store, &iter);
      gtk_list_store_set (store, &iter,
                          0, formats[i],
                          1, mime_type,
                          2, can_create_tags,
                          -1);

      g_free (mime_type);
    }

  g_free (formats);
}

static void
rich_text_paste_target_list_notify (GtkTextBuffer    *buffer,
                                    const GParamSpec *pspec,
                                    GtkListStore     *store)
{
  rich_text_store_populate (store, buffer, TRUE);
}

static void
rich_text_copy_target_list_notify (GtkTextBuffer    *buffer,
                                   const GParamSpec *pspec,
                                   GtkListStore     *store)
{
  rich_text_store_populate (store, buffer, FALSE);
}

static void
rich_text_can_create_tags_toggled (GtkCellRendererToggle *toggle,
                                   const gchar           *path,
                                   GtkTreeModel          *model)
{
  GtkTreeIter iter;

  if (gtk_tree_model_get_iter_from_string (model, &iter, path))
    {
      GtkTextBuffer *buffer;
      GdkAtom        format;
      gboolean       can_create_tags;

      buffer = g_object_get_data (G_OBJECT (model), "buffer");

      gtk_tree_model_get (model, &iter,
                          0, &format,
                          2, &can_create_tags,
                          -1);

      gtk_text_buffer_deserialize_set_can_create_tags (buffer, format,
                                                       !can_create_tags);

      gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                          2, !can_create_tags,
                          -1);
    }
}

static void
rich_text_unregister_clicked (GtkWidget   *button,
                              GtkTreeView *tv)
{
  GtkTreeSelection *sel = gtk_tree_view_get_selection (tv);
  GtkTreeModel     *model;
  GtkTreeIter       iter;

  if (gtk_tree_selection_get_selected (sel, &model, &iter))
    {
      GtkTextBuffer *buffer;
      gboolean       deserialize;
      GdkAtom        format;

      buffer = g_object_get_data (G_OBJECT (model), "buffer");
      deserialize = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (model),
                                                        "deserialize"));

      gtk_tree_model_get (model, &iter,
                          0, &format,
                          -1);

      if (deserialize)
        gtk_text_buffer_unregister_deserialize_format (buffer, format);
      else
        gtk_text_buffer_unregister_serialize_format (buffer, format);
    }
}

static void
rich_text_register_clicked (GtkWidget   *button,
                            GtkTreeView *tv)
{
  GtkWidget *dialog;
  GtkWidget *label;
  GtkWidget *entry;

  dialog = gtk_dialog_new_with_buttons ("Register new Tagset",
                                        GTK_WINDOW (gtk_widget_get_toplevel (button)),
                                        GTK_DIALOG_DESTROY_WITH_PARENT,
                                        GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                                        GTK_STOCK_OK,     GTK_RESPONSE_OK,
                                        NULL);
  label = gtk_label_new ("Enter tagset name or leave blank for "
                         "unrestricted internal format:");
  gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), label,
                      FALSE, FALSE, 0);

  entry = gtk_entry_new ();
  gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), entry,
                      FALSE, FALSE, 0);

  gtk_widget_show_all (dialog);

  if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_OK)
    {
      GtkTreeModel  *model  = gtk_tree_view_get_model (tv);
      GtkTextBuffer *buffer = g_object_get_data (G_OBJECT (model), "buffer");
      const gchar   *tagset = gtk_entry_get_text (GTK_ENTRY (entry));
      gboolean       deserialize;

      deserialize = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (model),
                                                        "deserialize"));

      if (tagset && ! strlen (tagset))
        tagset = NULL;

      if (deserialize)
        gtk_text_buffer_register_deserialize_tagset (buffer, tagset);
      else
        gtk_text_buffer_register_serialize_tagset (buffer, tagset);
    }

  gtk_widget_destroy (dialog);
}

static void
do_rich_text (gpointer callback_data,
              guint deserialize,
              GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextBuffer *buffer;
  GtkWidget *dialog;
  GtkWidget *tv;
  GtkWidget *sw;
  GtkWidget *hbox;
  GtkWidget *button;
  GtkListStore *store;

  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view->text_view));

  dialog = gtk_dialog_new_with_buttons (deserialize ?
                                        "Rich Text Paste & Drop" :
                                        "Rich Text Copy & Drag",
                                        GTK_WINDOW (view->window),
                                        GTK_DIALOG_DESTROY_WITH_PARENT,
                                        GTK_STOCK_CLOSE, 0,
                                        NULL);
  g_signal_connect (dialog, "response",
                    G_CALLBACK (gtk_widget_destroy),
                    NULL);

  store = gtk_list_store_new (3,
                              G_TYPE_POINTER,
                              G_TYPE_STRING,
                              G_TYPE_BOOLEAN);

  g_object_set_data (G_OBJECT (store), "buffer", buffer);
  g_object_set_data (G_OBJECT (store), "deserialize",
                     GUINT_TO_POINTER (deserialize));

  tv = gtk_tree_view_new_with_model (GTK_TREE_MODEL (store));
  g_object_unref (store);

  gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tv),
                                               0, "Rich Text Format",
                                               gtk_cell_renderer_text_new (),
                                               "text", 1,
                                               NULL);

  if (deserialize)
    {
      GtkCellRenderer *renderer = gtk_cell_renderer_toggle_new ();

      gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tv),
                                                   1, "Can Create Tags",
                                                   renderer,
                                                   "active", 2,
                                                   NULL);

      g_signal_connect (renderer, "toggled",
                        G_CALLBACK (rich_text_can_create_tags_toggled),
                        store);
    }

  sw = gtk_scrolled_window_new (NULL, NULL);
  gtk_widget_set_size_request (sw, 300, 100);
  gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), sw);

  gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (sw), tv);

  hbox = gtk_hbox_new (FALSE, 6);
  gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), hbox,
                      FALSE, FALSE, 0);

  button = gtk_button_new_with_label ("Unregister Selected Format");
  gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);

  g_signal_connect (button, "clicked",
                    G_CALLBACK (rich_text_unregister_clicked),
                    tv);

  button = gtk_button_new_with_label ("Register New Tagset\n"
                                      "for the Internal Format");
  gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);

  g_signal_connect (button, "clicked",
                    G_CALLBACK (rich_text_register_clicked),
                    tv);

  if (deserialize)
    g_signal_connect_object (buffer, "notify::paste-target-list",
                             G_CALLBACK (rich_text_paste_target_list_notify),
                             G_OBJECT (store), 0);
  else
    g_signal_connect_object (buffer, "notify::copy-target-list",
                             G_CALLBACK (rich_text_copy_target_list_notify),
                             G_OBJECT (store), 0);

  rich_text_store_populate (store, buffer, deserialize);

  gtk_widget_show_all (dialog);
}

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enum
{
  RESPONSE_FORWARD,
  RESPONSE_BACKWARD
};

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static void
dialog_response_callback (GtkWidget *dialog, gint response_id, gpointer data)
{
  GtkTextBuffer *buffer;
  View *view = data;
  GtkTextIter start, end;
  gchar *search_string;
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  if (response_id != RESPONSE_FORWARD &&
      response_id != RESPONSE_BACKWARD)
    {
      gtk_widget_destroy (dialog);
      return;
    }
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  buffer = g_object_get_data (G_OBJECT (dialog), "buffer");
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  gtk_text_buffer_get_bounds (buffer, &start, &end);
  
  search_string = gtk_text_iter_get_text (&start, &end);

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  g_print ("Searching for `%s'\n", search_string);
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  if (response_id == RESPONSE_FORWARD)
    buffer_search_forward (view->buffer, search_string, view);
  else if (response_id == RESPONSE_BACKWARD)
    buffer_search_backward (view->buffer, search_string, view);
    
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  g_free (search_string);
  
  gtk_widget_destroy (dialog);
}

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static void
do_copy  (gpointer callback_data,
          guint callback_action,
          GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextBuffer *buffer;

  buffer = view->buffer->buffer;

  gtk_text_buffer_copy_clipboard (buffer,
                                  gtk_clipboard_get (GDK_NONE));
}

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static void
do_search (gpointer callback_data,
           guint callback_action,
           GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkWidget *dialog;
  GtkWidget *search_text;
  GtkTextBuffer *buffer;
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  dialog = gtk_dialog_new_with_buttons ("Search",
                                        GTK_WINDOW (view->window),
                                        GTK_DIALOG_DESTROY_WITH_PARENT,
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                                        "Forward", RESPONSE_FORWARD,
                                        "Backward", RESPONSE_BACKWARD,
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                                        GTK_STOCK_CANCEL,
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                                        GTK_RESPONSE_NONE, NULL);

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  buffer = gtk_text_buffer_new (NULL);

  search_text = gtk_text_view_new_with_buffer (buffer);

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  g_object_unref (buffer);
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  gtk_box_pack_end (GTK_BOX (GTK_DIALOG (dialog)->vbox),
                    search_text,
                    TRUE, TRUE, 0);

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  g_object_set_data (G_OBJECT (dialog), "buffer", buffer);
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  g_signal_connect (dialog,
                    "response",
                    G_CALLBACK (dialog_response_callback),
                    view);
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  gtk_widget_show (search_text);

  gtk_widget_grab_focus (search_text);
  
  gtk_widget_show_all (dialog);
}

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static void
do_select_all (gpointer callback_data,
               guint callback_action,
               GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkTextBuffer *buffer;
  GtkTextIter start, end;

  buffer = view->buffer->buffer;

  gtk_text_buffer_get_bounds (buffer, &start, &end);
  gtk_text_buffer_select_range (buffer, &start, &end);
}

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typedef struct
{
  /* position is in coordinate system of text_view_move_child */
  int click_x;
  int click_y;
  int start_x;
  int start_y;
  int button;
} ChildMoveInfo;

static gboolean
movable_child_callback (GtkWidget *child,
                        GdkEvent  *event,
                        gpointer   data)
{
  ChildMoveInfo *info;
  GtkTextView *text_view;

  text_view = GTK_TEXT_VIEW (data);
  
  g_return_val_if_fail (GTK_IS_EVENT_BOX (child), FALSE);
  g_return_val_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (text_view), FALSE);  
  
  info = g_object_get_data (G_OBJECT (child),
                            "testtext-move-info");

  if (info == NULL)
    {
      info = g_new (ChildMoveInfo, 1);      
      info->start_x = -1;
      info->start_y = -1;
      info->button = -1;
      g_object_set_data_full (G_OBJECT (child),
                              "testtext-move-info",
                              info,
                              g_free);
    }
  
  switch (event->type)
    {
    case GDK_BUTTON_PRESS:
      if (info->button < 0)
        {
          if (gdk_pointer_grab (event->button.window,
                                FALSE,
                                GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |
                                GDK_BUTTON_RELEASE_MASK,
                                NULL,
                                NULL,
                                event->button.time) != GDK_GRAB_SUCCESS)
            return FALSE;
          
          info->button = event->button.button;
          
          info->start_x = child->allocation.x;
          info->start_y = child->allocation.y;
          info->click_x = child->allocation.x + event->button.x;
          info->click_y = child->allocation.y + event->button.y;
        }
      break;

    case GDK_BUTTON_RELEASE:
      if (info->button < 0)
        return FALSE;

      if (info->button == event->button.button)
        {
          int x, y;
          
          gdk_pointer_ungrab (event->button.time);
          info->button = -1;

          /* convert to window coords from event box coords */
          x = info->start_x + (event->button.x + child->allocation.x - info->click_x);
          y = info->start_y + (event->button.y + child->allocation.y - info->click_y);

          gtk_text_view_move_child (text_view,
                                    child,
                                    x, y);
        }
      break;

    case GDK_MOTION_NOTIFY:
      {
        int x, y;
        
        if (info->button < 0)
          return FALSE;
        
        gdk_window_get_pointer (child->window, &x, &y, NULL); /* ensure more events */

        /* to window coords from event box coords */
        x += child->allocation.x;
        y += child->allocation.y;
        
        x = info->start_x + (x - info->click_x);
        y = info->start_y + (y - info->click_y);
        
        gtk_text_view_move_child (text_view,
                                  child,
                                  x, y);
      }
      break;

    default:
      break;
    }

  return FALSE;
}

static void
add_movable_child (GtkTextView      *text_view,
                   GtkTextWindowType window)
{
  GtkWidget *event_box;
  GtkWidget *label;
  GdkColor color;
  
  label = gtk_label_new ("Drag me around");  
  
  event_box = gtk_event_box_new ();
  gtk_widget_add_events (event_box,
                         GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
                         GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK);

  color.red = 0xffff;
  color.green = color.blue = 0;
  gtk_widget_modify_bg (event_box, GTK_STATE_NORMAL, &color);
  
  gtk_container_add (GTK_CONTAINER (event_box), label);

  gtk_widget_show_all (event_box);

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  g_signal_connect (event_box, "event",
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                    G_CALLBACK (movable_child_callback),
                    text_view);

  gtk_text_view_add_child_in_window (text_view,
                                     event_box,
                                     window,
                                     0, 0);
}

static void
do_add_children (gpointer callback_data,
                 guint callback_action,
                 GtkWidget *widget)
{
  View *view = view_from_widget (widget);

  add_movable_child (GTK_TEXT_VIEW (view->text_view),
                     GTK_TEXT_WINDOW_WIDGET);
  add_movable_child (GTK_TEXT_VIEW (view->text_view),
                     GTK_TEXT_WINDOW_LEFT);
  add_movable_child (GTK_TEXT_VIEW (view->text_view),
                     GTK_TEXT_WINDOW_RIGHT);
}

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static void
do_add_focus_children (gpointer callback_data,
                       guint callback_action,
                       GtkWidget *widget)
{
  View *view = view_from_widget (widget);
  GtkWidget *child;
  GtkTextChildAnchor *anchor;
  GtkTextIter iter;
  GtkTextView *text_view;

  text_view = GTK_TEXT_VIEW (view->text_view);
  
  child = gtk_button_new_with_mnemonic ("Button _A in widget->window");

  gtk_text_view_add_child_in_window (text_view,
                                     child,
                                     GTK_TEXT_WINDOW_WIDGET,
                                     200, 200);

  child = gtk_button_new_with_mnemonic ("Button _B in widget->window");

  gtk_text_view_add_child_in_window (text_view,
                                     child,
                                     GTK_TEXT_WINDOW_WIDGET,
                                     350, 300);

  child = gtk_button_new_with_mnemonic ("Button _C in left window");

  gtk_text_view_add_child_in_window (text_view<